Base portion of a surgical retractor blade



FIG. 1 is a perspective view of a base portion of a surgical retractor blade in accordance with our design.

FIG. 2 is top view thereof.

FIG. 3 is a left side view thereof, it being understood that the opposite side is a mirror image thereof.

FIG. 4 is bottom view thereof.

FIG. 5 is a rear view thereof; and,

FIG. 6 is a front view thereof. 

CLAIM The ornamental design for a base portion of a surgical retractor blade, as shown and described. 